$cnu = "$Env:Username@$Env:Computername"
$os = (Get-WmiObject Win32_OperatingSystem).Caption
$kernel = (Get-WmiObject Win32_OperatingSystem).version

$output = "  __       $cnu
<(o )____  os ~ $os
 ( ._>  /  kernel ~ $kernel
  ``----'   disk ~ $Env:SystemDrive"

Write-Host $output